A/C duct problem

[BlackNBlue91]

I have air coming out of the floor ducts and the defrost ducts, but nothing out of the dash vents. Any thoughts?

 

[ID89GT]

Check to make sure you vacuum canister is still hooked up. Or you could have a vacuum leak somewhere under the dash like me and need to take the whole dash off to fix it more than likely..

 

[7upstang91]

Just a vaccum line snapped near the canister. They get old and brittle and tend to break.

 

[jrichker]

Diagrams courtesy of Tmoss & Stang&2birds

See the following website for some help from Tmoss (diagram designer) & Stang&2Birds
(website host) for help on 86-95 5.0 Mustang wiring Mustang FAQ - Engine Information Everyone should bookmark this site.

Ignition switch wiring
http://www.veryuseful.com/mustang/tech/engine/images/IgnitionSwitchWiring.gif

Fuel, alternator, A/C and ignition wiring
http://www.veryuseful.com/mustang/tech/engine/images/fuel-alt-links-ign-ac.gif

Complete computer, actuator & sensor wiring diagram for 88-91 5.0 Mass Air Mustangs
http://www.veryuseful.com/mustang/tech/engine/images/88-91_5.0_EEC_Wiring_Diagram.gif

Complete computer, actuator & sensor wiring diagram for 91-93 5.0 Mass Air Mustangs
http://www.veryuseful.com/mustang/tech/engine/images/91-93_5.0_EEC_Wiring_Diagram.gif

Complete computer, actuator & sensor wiring diagram for 94-95 5.0 Mass Air Mustangs
http://www.veryuseful.com/mustang/tech/engine/images/94-95_5.0_EEC_Wiring_Diagram.gif

Vacuum diagram 89-93 Mustangs
http://www.veryuseful.com/mustang/tech/engine/images/mustangFoxFordVacuumDiagram.jpg

HVAC vacuum diagram
http://www.veryuseful.com/mustang/tech/engine/images/Mustang_AC_heat_vacuum_controls.gif

TFI module differences & pinout
http://www.veryuseful.com/mustang/tech/engine/images/TFI_5.0_comparison.gif

Fuse box layout
http://www.veryuseful.com/mustang/tech/engine/images/MustangFuseBox.gif

 

[BlackNBlue91]

Where is the canister you refer to on a fox? Do I access it by taking the dash off?

 

[7upstang91]

No it is on the left side firewall when you are facing the car. Just behind the Trottle body but attached to the firewall. Look for a little black vaccum line.

 

[7upstang91]

Should be a silver color. Or mine is anyway. The tiny black hose will be running through the firewall as well.